diff options
| author | Raymond Mao | 2024-02-03 08:36:24 -0800 |
|---|---|---|
| committer | Tom Rini | 2024-02-29 09:24:22 -0500 |
| commit | 11f3171256337dfb81ead526bb2dd78503839882 (patch) | |
| tree | 8ebb0a8ec50a2397ccba15768547fc81382db45e /arch/arm/cpu | |
| parent | 5103e69344d60eb8c8d2cf804ec00d0ef3975124 (diff) | |
arm: armv8: save boot arguments
Save boot arguments x[0-3] into an array for handover of bloblist from
previous boot stage.
Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv8/start.S | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S index 6cc1d26e5e2..74612802617 100644 --- a/arch/arm/cpu/armv8/start.S +++ b/arch/arm/cpu/armv8/start.S @@ -370,5 +370,28 @@ ENTRY(c_runtime_cpu_setup) ENDPROC(c_runtime_cpu_setup) WEAK(save_boot_params) +#if (IS_ENABLED(CONFIG_BLOBLIST)) + /* Calculate the PC-relative address of saved_args */ + adr x9, saved_args_offset + ldr w10, saved_args_offset + add x9, x9, w10, sxtw + + stp x0, x1, [x9] + stp x2, x3, [x9, #16] +#endif b save_boot_params_ret /* back to my caller */ ENDPROC(save_boot_params) + +#if (IS_ENABLED(CONFIG_BLOBLIST)) +saved_args_offset: + .long saved_args - . /* offset from current code to save_args */ + + .section .data + .align 2 + .global saved_args +saved_args: + .rept 4 + .dword 0 + .endr +END(saved_args) +#endif |